SOLUTION: In a survey, the planning value for the population proportion is p*= 0.35 . How large a sample should be taken to provide a 95 per cent confidence interval with a margin of error

Question 466794: In a survey, the planning value for the population proportion is p*= 0.35 . How large a sample should be taken to provide a 95 per cent confidence interval with a margin of error of 0.05 ?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In a survey, the planning value for the population proportion is p*= 0.35 . How large a sample should be taken to provide a 95 per cent confidence interval with a margin of error of 0.05 ?
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n = [z/E]^2*pq
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n = [1.96/0.05]^2*0.35*0.65 = 350 when rounded up
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Cheers,
Stan H.
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